Insulator



'w. LB R. EMMET.

INSULATOR. M

No. 443,174. P&tented Dec. 23, 1890.

(No Model.)

UNITED STATES PATENT OFFICE.

WILLIAM LE ROY EMMET, OF EAST ROCKA\VAY, NEW YORK.

NSU LATO R.

'SPECIFICATION forming part of Letters Patent No. 443,174, dated December 23, 1890. Application filed September 18, 1890. Serial No. 365 399. (No model.)

T0 ZZ whom it may concern:

Be it known that I, WILLIAM LE ROY EM- MET, a citizen of the United States, residing at East Rockaway,Queens county, and State of New York, have invented or discovered a certain new and useful Improved Insulator, of which improvement the following is a specification.

In the accompanying drawin gs, Which make part of this specification, Figure 1 shows a transverse section of the spindle and insulator on the line where said insulator is gripped by the yoke and spam-wire, with a plan of said yoke and span-wire. Fig. 2 is a side elevation of Fig. 1, looking at the insulator along the line of span-wire; Fig. 3, a central section through Fig. 2 on a vertical plane at right augles with the direction of the trolleywire; and Fig. 4, a side view on the side of the span-wire loop, showing yoke and spanwire secured around an insulator with button-spindle.

One purpose of my invention, generally stated, is to devise simple and strong forms of insulators from which the weight of the wires may be supported by strains of compression instead of tensile strains,which prevents rupt ure and grips the insulator more strongly as the weight increases.

A further object is to fasten the insulator to the upper wire by connections exterior to the body of said insulator, which method of connection leaves the donne of said insulator with an unbroken water-shed. The connections are also designed to loc easily applied, removed, and exchanged.

The improvements herein described show methods of suspending and insulating any wire from another, but are peculiarly applicable to electric-railway work, and the upper and lower wires are therefore referred to as span and trolley wires.

The clip shown in the several views is not herein claimed, as it, inter alia, constitutes the subject-matter of another application, of even date herewith, filed by me, Serial No. 365,928.

In Figs. 1 to 3, 1 is an insulator, preferably of wood, dome=shaped at the top, and with a groove 2 running around its surface on a line about half-way from its top to the base. The base of said insulator 1 is best concave to guard against moisture, and the insulator is centrally and longitudinally cored to receive a connecting-spindle, the upper part of which is threaded at 3, supported by nut 5, resting upon a shoulder The plug 7 closes the opening of the core. The connecting-spindle just belowthe body has a shoulder 8 and is extended dowuward into two forks 9 9, which inclose a log 10 on a clip 11, supporting trolley-wire 12. Rivet 13 fastens forks 9 9 to lug 10. Said insulator 1 is fastened to span-wire 14 by a yoke 15, of malleable iron, hooked at both ends, said hooks. grasping said span-wire on either side of said insulator and said spam-wire being deflected from a straight line to 1ie in the groove 2 and partially embrace said insulator.

In Fig. et, 16 shows any insulating mass of material molded or cast around a connectingspindle '17.

Other connecting devices than hooks may be used on the yoke 15, and the extent of contact of said yoke or said span-wire with said insulator may be greatly Varied The contour of the surface of the insulator may be changed so as to be conioal, channeled, &c.

The method of securiu g the insulator to the span-wire may be employed on other forms of insulators than those shown, and the insulators shown maybe used with other methods of attachment to span and trolley wires than here exhibited.

I claim- 1. The combination of a deflected spanwire, a yoke secured at both ends to said spanwire at or near said points of deflection,

an insulator inclosed between said span-wire and said yoke, and a trolley-wire suspended from said insulator and by its weight causing the insulator to be firmly gripped between said span-wire and said yoke, substantially as set forth.

2. The combination of a yoke secured at each end to a span-wire, a span-wire between the points of said connection deflected from the straight line, a body of insulating material gripped between said-yoke and said spanwi re, a connecting-spindle sustained in said insulating material by a nut on said spindle resting upon a shoulder of said insulating material, said spindle having a shoulder immediately below said insulating material, de-

IOO

said meta11ic fixture to a tr011ey-wire, and said trolley-wre, snbstantially as set forth.

-;L, An insuiat0r consisting of a body of insn]ating materia], a connecting-spindle sustained in said body by a nui; resting On a 15 shou1der formed in said body, said spindle having a shoulder mmediately below said body, and devices forconnecting said spindle to a tro1ley-wire, snbstantially as set f0rth.

In testimony whereof I have herennt0 set 2o my hand.

WILLIAM LE ROY EMMEI. \\"itnesses:

J AMES A. MCKEAN, WM. L. PIERCE. 

